Paint chips?
There are so many versions these days. Was it:
Takara's MP-1 Convoy?
Takara's MP-4 Convoy w/ Trailer?
Hasbro's 20th Anniversary Optimus Prime?
Hasbro's Optimus Prime (with DVD)?
I have MP-1 and it's near perfect with no paint snafu's, chips, or misaligned parts.